Northeast of Aquila is the diamond-shaped cluster known as the
Dolphin. The constellation was pictured in Grecian mythology as the
fish on whose back a great musician rode through the sea. East of
Dolphin, tracing a path that swings overhead, are the four stars of the
great square of Pegasus, the winged horse of the ancient Greeks.
Trailing after the star Alpherats, on the northeast corner of the
square, is a stellar chain known as Andromeda. This was the name of a
daughter of Queen Cassiopeia, of Ethiopia. The faint patch of light next
to and slightly north of the middle star in Andromeda is actually a great
system of stars, classified as a spiral nebula, and the only one visible to
the naked eye. This so-called nebula, better termed an "island universe,"
is one of thousands in the sky and the nearest to the earth. It is entirely
outside our own "island Universe"---called the Milky Way system, and is
estimated at 75,000 light years in length.
There are in the whole sky twenty first-magnitude stars, fifteen of
which can be seen north of Atlanta. In Florida all of them can be seen.
They include Canopus, second brightest of all stars. The Southern Cross,
which can be seen in the early evening in May and June in lower Florida,
with the twins Alpha and Beta Centauri, furnish one of the most
inspiring sights of the sky.